onsets.energyDensity: Extracts Onsets from an energyDensity Object
In LiKao/VoiceExperiment: Analysis of Vocal Responses to Psychological Experiments

Extracts Onsets from an energyDensity Object

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## S3 method for class 'energyDensity'
onsets(ts, limit = c(0.1, 0.01),
  limit.type = c("absolute", "relative"), min.duration = 0.1, ...)

`ts`	The object containing the time series data.
`limit`	Parameters used for detecting onsets. See 'Details'
`limit.type`	Type of limit, which is used to detect on- and offsets. If set to `absolute` (default) then the limit value is used directly. If set to `relative` then the limit is determined as the energy in the i-th percentile, where i is given by the limit parameter.
`min.duration`	Minimum duration of onsets to be detected. Onsets that have less duration than this value (in seconds) will be assumed to be false positives and be discarded. Set to `NULL` or `0` to disable filtering of short onsets.
`...`	ignored